Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon, showing our new design;

FIG. 2 is another front view thereof, as shown in a display screen environment; and,

FIG. 3 is another front view thereof, as shown in another display screen environment.

The broken lines are for environmental purposes only and form no part of the claimed design. The dot-dash broken lines represent unclaimed boundary lines and form no part of the claimed design. 

CLAIM We claim, the ornamental design for a display screen or portion thereof with icon, as shown and described. 